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Chemistry

Chemistry
Iron is extracted from

Cinnabar
Dolomite
Haematite
Bauxite

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Chemistry
When cathode rays strike a target of high atomic weight, they give rise to

Positive rays
? and ? rays
X-rays
?-rays

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Chemistry
The most common cause of pollution of air is

Carbon dioxide
Sulphur dioxide
Smoke
Carbon monoxide

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Chemistry
The substance which does not expand on going from liquid state to solid state is

Cast-iron
Water
Aluminium
Type metal

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Chemistry
'Fire-fighting clothes' are made from

Talc
Steatite
Mica
Asbestos

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Chemistry
The product, 9-nitroanthracene is obtained from anthracene by the action of

Nitric acid and acetic acid
Nitric acid and ethyl alcohol
Nitric acid and acetic anhydride
Nitric acid in excess

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